Bleeding and Wounds in Pets: What to Notice and Who to Call

Blood is a bad witness. It looks like a lot when it is not much, it hides on dark fur, it spreads on a hard floor, and it makes calm people stop thinking. Meanwhile the injuries that turn out to matter most are frequently the ones that produced the least mess - a small puncture, a bite that barely broke the skin, a wound the animal will not let you look at.

This page will not tell you how to treat a wound. It will help you work out what you are looking at, what to note before it changes, what to say when someone picks up the phone, and why the injuries that look least alarming are often the ones a vet most wants to see.

Why the size of the wound is a poor guide

The instinct is to grade an injury by how it looks. It is the wrong instrument, and understanding why changes how quickly you pick up the phone.

A wound has three separate properties, and only one of them is visible. There is the hole - what you can see. There is the tract - where the damage went underneath, which you cannot see. And there is the contamination - what went in with it, which you also cannot see. A long, dramatic, shallow graze can score badly on the first and well on the other two. A puncture the size of a pinhead can be the entrance to a deep, dirty, crushed channel.

Bite wounds are the classic example, and the reason vets take them so seriously. Teeth are not knives; they puncture and then the jaws crush and shear the tissue underneath while the skin, which is elastic, closes back over. What you see is two small dots. What is underneath can be a large area of damaged tissue sealed in with bacteria - which is precisely the situation that goes wrong two days later, not two minutes later. Any bite from another animal is a phone call, however small the marks.

The same logic applies to anything that punctured - a stick, a nail, a fence, a thorn - and to anything where the skin moved over the tissue underneath, such as being dragged or hit. And it applies to anywhere on the body that is close to something important: the chest, the abdomen, the throat, the face, the eyes, and the joints.

What to notice before it changes

Wounds change. Fur mats over them, animals lick them, bleeding stops and restarts, swelling arrives. What you can see in the first minute is information that may not be available later, so bank it. Describe, do not diagnose.

• Where it is. Which part of which limb or which side of the body, described the way you would to someone who cannot see it.
• How big, compared with something ordinary. A grain of rice, a fingernail, the length of a matchstick. Comparisons travel better than guessed centimetres.
• What kind of opening. A clean split, a ragged tear, a graze, a small hole, several small holes, a flap of skin, something still in there.
• How it is bleeding. Oozing, soaking, dripping, spurting, or stopped. Whether it started and stopped and started again.
• How much, honestly. Estimate against something - a coin-sized patch, a tea-towel soaked, a trail across a room. Overstating is safer than understating.
• What caused it, and when, as a clock time.
• What the rest of the animal is doing. Weight-bearing or not, gum colour, breathing, alertness, whether they will let you near, whether they are trembling or unusually quiet.

If it is safe to do so from where you are standing, take a photograph. A picture taken before anything is disturbed is genuinely useful to a vet and impossible to recreate afterwards. Never make an animal in pain tolerate handling for the sake of a photo, and never let it cost you a minute.

Your own safety, which is not optional

An animal in pain is not the animal you live with. Pain overrides temperament completely, and the gentlest dog or cat in the world may bite the person leaning over them - not out of character change, but out of reflex. A significant number of human hospital attendances after a pet injury are the owner, not the pet.

This page does not describe restraint or handling methods, because those are techniques and techniques applied badly cause injury to both parties. What it will say is this: tell the practice, on the call, that your pet is frightened or in pain and how they are reacting to being approached. Ask them how they want you to get the animal to the car and into the building. They will have a plan, and it will be a better plan than an improvised one.

Why this page does not describe wound management

This page used to carry step-by-step physical instructions. That was removed deliberately. The short version: what to do to a wound depends on facts about the wound that cannot be established from a page.

• The right action depends on what kind of wound it is, where it is, what is in it and what is underneath it - the four things you cannot reliably determine by looking.
• Anything embedded changes everything. Whatever is in there may be doing a job while it is in there. That is a refusal, not a technique: leave it, and say on the phone that something is still in the wound.
• Substances applied to wounds cause problems. Products intended for people, or from a cupboard, can damage tissue, delay healing, and obscure what the vet needs to assess. Give nothing by mouth either - human painkillers in particular are a well-known cause of serious harm in pets, and the ibuprofen and paracetamol checker exists because that mistake is so common.
• Some interventions are actively dangerous when misapplied, and the ones owners reach for under stress are exactly the ones with the narrowest margin for error. A person on the phone can decide whether one is warranted for your animal. A page cannot.
• Doing is not the same as helping. The most common serious mistake in an injury is that a great deal happened at home and the journey started late.

If a vet tells you to do something, do exactly that - that is a judgement about your animal in real time. The general argument is on Pet First Aid Truths - What Not To Do and Why.

Saying it when they pick up

Lead with the injury and the animal, then let them ask. For example: "My cat has come in with a wound on her left back leg, about the size of a fingernail, and it is oozing rather than pouring. I think she has been in a fight. She is eight, about four kilos, she is very quiet and she will not let me look at it. I am twenty minutes away."

Have ready: who the pet is (species, breed or best guess, age, rough weight), any conditions, everything they take regularly read off the packet, what happened, when, and the description above. Write down what the practice tells you and read it back before you hang up. Ask what should I watch for on the way and what would make you want to see her sooner. Tell them you are coming. The full version of this preparation is on Before You Call the Vet.

If cost is on your mind - and it is on most people's minds, however little they want to say so - raise it early in the conversation rather than at the end. Practices deal with this every day and would far rather discuss it at the start than have you not ring at all. Our guide to vet costs is background reading for a calm day, not a reason to hesitate now.

The injuries owners under-call, and why

Some categories get talked out of a phone call disproportionately often. They are worth naming.

• Bites and scratches from other animals. Small marks, big underneath. Cats in particular seal these over and present days later with a swelling.
• Punctures from sticks, nails, fences, thorns and glass. A tiny entrance can be a long tract, and material can break off inside.
• Anything on or near the eye, the mouth, the throat, the chest, the abdomen or a joint. Location beats size every time.
• Torn or damaged nails and pads. Painful, prone to contamination and slow to heal, and owners routinely wait a week.
• Injuries with no visible wound at all. A fall, a car, a dog picking up a smaller dog. The absence of blood says nothing about what happened underneath.
• Wounds the animal keeps licking. Licking is not cleaning; it delays healing and introduces bacteria, and a wound the animal will not leave alone is a wound that is bothering them.
• Anything that reopens, smells, swells, changes colour, or is followed by an animal going quiet, off food, or lame a day or two later.

Cost, embarrassment and the fear of overreacting are the three reasons people give for not ringing. None of them is a clinical reason. Nobody at a veterinary practice thinks less of an owner who calls about a graze; they think a great deal less of the two-day-old infected bite that could have been dealt with on the night.

Afterwards, and on a calm day

When you get home, the two things that go wrong are stopping a course of treatment early because the animal seems fine, and not ringing back when something changes. Ask before you leave the practice what specifically should make you call again, and write the answer down.

On an ordinary afternoon: save your practice's number and an out-of-hours number under names you can find while shaking, print the emergency pack fridge sheet for the kitchen and for anyone who looks after your animals, and do a slow walk round the house and garden at your pet's eye level - the poison control directory is a structured version of that. Learning what your own animal looks like when they are guarding a sore spot is the quiet skill that catches these early; reading your pet's body language covers it.

If you want to be genuinely more useful in an emergency, do a hands-on pet first-aid course with a qualified instructor. Practical skills are taught by practice, not by reading, and that is exactly why this page stops where it does.

Where this page sits

One of four situation pages built the same way - notice, record, prepare, call. The others are heat illness, choking and seizures. The reasoning is on Pet First Aid Truths, the phone preparation on Before You Call the Vet, and anything swallowed starts at My Dog Ate Something. See also the emergency triage helper and the pet emergency hub.